Bueglae alaem



(Model.) l 2Sheets-Sheet 1.

B. PAY.

BURGLAR ALARM. No. 285,023.` Patented Sept. 18, 1888.

(Model.) 8 2 sheets-sheet 2.

' B.4 PAY. BURGJLAR ALARM. N o. .285,023. Patented Sept. 18, 1883.

'UNITED STATES PATENT OFFICE.

EEENAED EAY, oE rrrrsnunc, PENNSYLVANIA.

BURGLAR-ALARIVI.

SPECIFICATION forming part of Letters Patent No. 285,023, dated September 18, 1883.

Application filed May 26, 1883.

P all whom, it may concern.'

Be it known that I, BERNARD FAY, a citil zen of the United States, residing at"`l?itts lar-Alarms Combined, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improvement in bell-pulls and burglar-alarmscombined; and it consists in an alteration of certain parts as described in Patent No. 206,899 of the United States, and in an addition of new parts, whereby the bell-pull is made to work easier, and the alarm never fails to respond at a slight turn of the door-knob.

The bell-pulls now in use are objectionable, owing to the strength required to make them ring, so that children or persons not having much strength can use them only by great efforts, and even then do not always succeed. Another objection is that after being used a short time they get out of order, owing to the great strain on the wire that lifts the pivoted lever by which the hammer is made to strike the bell. The burglar-alarms combined with the mechanism of the bell-pull are objected to because they are weak and unreliabe, owing to the yielding of the yoke on the knob- -handle that is connected by chains with the ringing apparatus. When the door-knob is turned slowly and with care, the ringing of the bell may easily be avoided.

My object has been to overcome these objections by connecting the bell-pull directly with the bellstriking mechanism, and by substituting for the lifting-wire cam a solid lever that is easily operated. I also adopt for the burglar-alarm, in place of a yoke secured to the handle of the door-knob, a iiat bar or plate through which passes the shank of the door-knob, so that it becomes impossible to turn the knob without causing the bell to ring, as will be more fully described hereinafter.

The accompanying drawings represent my invention.

.Figure l is akrear elevation. Fig. 2 is a front elevation. Fig. 3 is a side view. Fig. 4 is a rear elevation of theoperating mechanism (Model.)

with the bell removed. Fig. 5 is a detached view of the lever connected to the door-pull. A represents aplate, of any suitable material and form, to be secured to the door or door-post. In this plate are two oblong openings, b and c, the one over the other, ofwhich the upper one, b, is for the passage of a'wire that connects the Vbell-pull B with the bellstriking mechanism, and the lower one, c, for a projection, f, on the rear side of the pull to pass through. The bell-pull B has on its rear side a projection, d, that serves as a check to hold the pull at a distance from the plate for the hand to seize it, and also for the attachment of a wire, e, that, after passing through the opening b, connects the pull directly with a lever, g, that causes the bell to strike when pulled. The other projection, f, on the rear side of the bell-pull B has a shoulder at its lower edge, that, when. the pull isdrawn back to ring the bell, bears against the face of the plate A and prevents its being pulled farther than necessary. The projection f, after passing through the opening c, protrudes at the rear of the plate A, and has its fulcrum in bearings formed behind and with the plate.

At the end of the projection f is hooked a pull B closely against the outside of the plate when not forcibly drawn back, and restores it to its former position when set free.

The mechanism for striking the bell and the bell are on a plate, G, that is to be secured to the inside of the door or door-post opposite to the plate A. The connection between the `bell-pull B and `the mechanism is made by means of a wire, e, attached to the projection d on the pull, and to the lever g, pivoted on the plate C under the bell. The lever g consists of a pivoted arm, from the side of which, near its end, projects a triangular cam, 71, of which the lower point reaches below the width of the arm of the lever x, so that when pulled down the slanting side, beginning at the point, is gradually brought to push back the lever x, that, in connection with other parts, causes the hammer to strike the bell. By the increased leverage of the cam, the pulling of the bell is ICC made much easier than heretofore, and not liable to become disarranged, as is the case when a wire is'used for a similar purpose.

In order to attach the door-knob to the same alarm as the door-pull, there is passed over the shank of the knob a lever, m, which pro-- jects equally at both ends beyond the shank. To each end of this lever m is attached a short chain, z2, which chains z2 are fastened to one end of the triangular lever y. To the other end of this triangular lever y is secured the chain z, which extends upward and is fast# cned to the longer end of the lever m. To the shorter end of the lever x is attached the pivoted end piece, a2, which is beveled upon its inner edge, as shown. lVhen the lever .r is pulled downward, either by a direct pull on the chains attached to the door-knob, or is forced downward by a pull upon the lever g, having the projection 7L, the lever x forces the beveled end piece against thebeveled end ofthe pivoted lever b2, and forces the lever Zf" to turn upon its pivot sufliciently to strike the alarm,

when the lever b2 is drawn back into position by means of the construction above de` scribed, it will be seen that, whether the pull is exerted upon the door-pull or the knob is turned, the alarm is causedto strike twice. It will be seen that both the door-pull and the door knob are attached to the same alarm, and that each one will cause the alarm to strike twice each time either one or the other is moved.

Having thus described my invention, I claim ,a

1 .The combination of the shank of the door-knob with lthe lever f, the chains connected to its ends, the triangular lever, the connecting rod or chain, the lever x and pivoted end piece, the leverrbl, suitable springs connected to the levers w and I)2 for returning them to position, and the alarm, substantially as shown.

2. The combination of the door-pull, the connecting rod or wire, the lever g, having the projection 7L, the lever x, provided with the pivoted end piece, the lever b2, suitable springs for returning the levers to position, and the alarm, substantially as shown.

In testimony that I claim the foregoing AI have hereunto set my hand this 17th day of March, 1883.

BERNARD FAY.

Witnesses:

Louis Monsnn, J. E. HrRsoI-. 

